Simply use the "Guest Log In," then enter your zip code (even if out of state ) ENJOY: http://www.louisianapass.org/index.php
I've blogged in the past about why we occasionally choose to do testing even though our state doesn't require it for elementary aged students. One of the main reasons is so that our children can be prepared for testing in the event that our state laws change and make them a requirement for homeschoolers.
If you want a few other tips, visit this older post:
http://www.joyfuljunction.com/1/post/2010/01/couselors-office-standarized-testing.html